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425 vs 440 16 of 19 identical Swap Change panels

Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2+ 440

Q-Cells Q.TRON BLK M-G2+ 425
Q.TRON BLK M-G2+ 425
425 Wp 21.80 % N-type
Open panel page Datasheet PDF
VS
Q-Cells Q.TRON BLK M-G2+ 440
Q.TRON BLK M-G2+ 440
440 Wp 22.50 % N-type
Open panel page Datasheet PDF
The verdict

440 leads on the differences that matter

The largest is module efficiency: 0.70 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 425 440 Difference
Module efficiency 21.80 % 22.50 % 0.70 pp more efficient
Power density 217.6 Wp/m² 225.3 Wp/m² 7.7 Wp/m² higher
Rated power 425 Wp 440 Wp 15 W more power
02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
425
14,338 kWh
440
14,844 kWh
Lifetime gap
506 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 425 440
Standard test conditions 25 °C 100.0% of rated power 425 W 440 W
Cool, bright day 40 °C 95.7% of rated power 407 W 421 W
Typical summer roof 55 °C 91.3% of rated power 388 W 402 W
Hot roof 70 °C 87.0% of rated power 370 W 383 W
03

Full specification

Parameter 425 440 Difference
Power and efficiency
Rated power 425 Wp 440 Wp +15 W for 440
Module efficiency 21.80 % 22.50 % +0.70 pp for 440
Power density 217.6 Wp/m² 225.3 Wp/m² +7.7 Wp/m² for 440
Open-circuit voltage 39.03 V 39.88 V Effectively the same
Voltage at max power 32.74 V 33.33 V Effectively the same
Short-circuit current 13.66 A 13.90 A Effectively the same
Current at max power 12.98 A 13.20 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 1722x1134x30 mm Same
Module area 1.953 m² 1.953 m² Same
Weight 21.2 kg 21.2 kg Same
Weight per kWp 49.9 kg/kWp 48.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 25 yrs 25 yrs Same
Annual degradation 0.33 %/yr 0.33 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 108 108 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#7,022 vs #4,222
440 leads by 2,800 places
Power density
#7,172 vs #4,099
440 leads by 3,073 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#3,266 vs #2,087
440 leads by 1,179 places
Warranty
#9,798 vs #9,798
Tied - the same position in the database
Overall
#9,034 vs #7,585
440 leads by 1,449 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2.H1+/AC (Power class 440W)
8 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2.D1+/AC (Power class 435W)
8 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2+ 435
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2.C1+/AC (Power class 430W)
6 differences, the largest is weight
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2+ 430
One difference: module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 425 vs Q-Cells Q.TRON BLK M-G2.E1+/AC (Power class 425W)
5 differences, the largest is weight per kwp
06

Written summary

07

Questions about this pairing

Which panel is better: Q-Cells Q.TRON BLK M-G2+ 425 or Q-Cells Q.TRON BLK M-G2+ 440?
According to our database: Q-Cells Q.TRON BLK M-G2+ 440 has higher module efficiency (22.50% vs 21.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Q-Cells Q.TRON BLK M-G2+ 425 and Q-Cells Q.TRON BLK M-G2+ 440?
Q-Cells Q.TRON BLK M-G2+ 425 has a module efficiency of 21.80%, while Q-Cells Q.TRON BLK M-G2+ 440 is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Q-Cells Q.TRON BLK M-G2+ 425 use vs Q-Cells Q.TRON BLK M-G2+ 440?
Q-Cells Q.TRON BLK M-G2+ 425 uses N-type cells; Q-Cells Q.TRON BLK M-G2+ 440 uses N-type. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.
What is the warranty on Q-Cells Q.TRON BLK M-G2+ 425 and Q-Cells Q.TRON BLK M-G2+ 440?
Q-Cells Q.TRON BLK M-G2+ 425 has a 25 years power warranty; Q-Cells Q.TRON BLK M-G2+ 440 has a 25 years power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80-87%). Product (materials) warranties are usually shorter.

Shop prices: See 28 Q-Cells offers

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.